Milton 1090-150 ASME Safety Valve, 1/4-inch MNPT, 150 PSI Pop-Off

Milton 1090-150 ASME Safety Valve, 1/4-inch MNPT, 150 PSI Pop-Off

• The Milton 1090-150 ASME Safety Valve is designed to protect air compressor tanks and other pressure vessels. It opens at 150 PSI to release excess pressure, then automatically resets when pressure drops to a safe level. Built from durable brass, it meets ASME standards and provides reliable overpressure protection.
• Features:
  • 150 PSI pop-off pressure - protects compressed air systems by relieving excess pressure at the set point.
  • 1/4-inch MNPT male thread - standard connection for compressor tanks and fittings.
  • ASME-certified and National Board listed - ensures compliance with safety regulations.
  • Bubble-tight up to 90% of set pressure - prevents leakage until release point is reached.
  • Automatic reset - valve closes once pressure falls below approximately 50% of the set point.
  • Compact 2-inch overall length - fits in tight installations.
  • Brass body construction - resists corrosion and ensures long service life.
• Specifications:
  • Manufacturer: Milton Industries
  • Part Number: 1090-150
  • Thread Size: 1/4-inch MNPT
  • Set Pressure: 150 PSI
  • Overall Length: 2 inches
  • Material: Brass with plastic cap
  • Certification: ASME coded, National Board certified
  • Reset Range: Closes when pressure falls below ~50% of set point
• The Milton 1090-150 safety valve can also be referred to as 150 PSI ASME safety relief valve, Milton compressor tank valve 1090-150, 1/4-inch MNPT air tank safety valve, or Milton Industries 1090-150 pressure relief valve.

The Milton 1090-150 ASME Safety Valve offers dependable protection for compressed air systems, ensuring safe operation with its certified brass construction, automatic reset function, and 150 PSI pop-off setting.

Q: Can this valve be used on standard air compressors?
A: Yes. It is designed for use on air compressor tanks and pressure vessels requiring a 1/4-inch MNPT connection and a 150 PSI safety release setting.

Q: Does the valve leak during normal use?
A: No. The valve remains bubble-tight up to within 10% of its set pop-off pressure, ensuring no leakage during regular operation.

Q: How does the reset function work?
A: After relieving excess pressure, the valve automatically resets and closes once pressure falls below about 50% of the 150 PSI set point.